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2001-2007 GM Allison 4x4 1000/2000
It fits into the block like the factory drain tube
It directly impacts performance
if used with smaller (or Stock) injectors may hurt performance and throttle response before turbo is fully spooled up
These sleeves are a quick upgrade that can be installed in minutes in your driveway
Stainless Steel Turbo Stud Kit for S-300/S-400 Fleece Performance 2018 2001-2007 GM Allison 4x4 1000/2000Fleece Performance stainless steel turbo stud kit for S 300 and S 400 turbos. Our studs are produced in the USA from aged 630 stainless steel and feature a 4mm internal hex head for easy installation. Impervious to rust and corrosion, these studs not only look good, but allow for higher clamping force. Features: Maximum turbo flange thickness of 3 8 inch Hot re torque required